Original (Romaji) Lyrics:

Si deus me relinquit, 
Ego deum relinquo

Solus oppressus nigram clavem habere potest

Omnias ianuas praecludo, 
Sic omnias precationes obsigno

Sed, 
Qui me defendet 
me terribilissimo ipse?

English Translation:

If God has forsaken me, 
Then I shall forsake God, too

Only the oppressed may possess a black key

I close all doors, 
Thus I seal away all prayers

However, 
Who protects me 
From the me who is most terrible?